148 lines
7.3 KiB
Plaintext
148 lines
7.3 KiB
Plaintext
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Parts list:
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Cut down 76 pin connector available at Radio Shack--trim to 64 pins
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Male DB25 connector/Hood
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14 conductor wire for cable
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+5 V power supply
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2x1 uF tantalum caps
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1x.0015 uF capacitor
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5x 74LS93
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2x 74LS153
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5x 14 pin sockets (wire wrap)
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2x 16 pin sockets (wire wrap)
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A board to make it on
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NOTES:
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SA1-SA32 are Genesis pins A1-A32
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SB1-SB32 are Genesis pins B1-B32
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P1-P25 are Amiga parallel port pins 1-25
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+-----------------+
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| 1 |
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+--------------------------------+--------+ |
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5 | B | 12 |
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>----+ Vcc 1 +--------+-------->A 1 SA17
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10 | | 9
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>----+ Gnd 74LS93 2 +----------------->A 2 SA15
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14 | | 8
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>----+ A 3 4 +----------------->A 3 SA13
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CNT | | 11
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| 8 +------+---------->A 4 SA11
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| R1 R2 | |
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+---+----+--------------------------------+ |
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| 2 | 3 |
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>-------+----+ +--------------------------+
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CLR | | | +-----------------+
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| 2 | 3 | 14 | 1 |
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+---+----+------------+----------+--------+ |
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5 | R1 R2 A B | 12 |
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>----+ Vcc 1 +--------+-------->A 5 SA9
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10 | | 9
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>----+ Gnd 74LS93 2 +----------------->A 6 SA7
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| | 8
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| 4 4 +----------------->A 7 SA5
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| | 11
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| 8 +------+---------->A 8 SA3
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| R1 R2 | |
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+---+----+--------------------------------+ |
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| 2 | 3 |
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| | +--------------------------+
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| | | +-----------------+
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| 2 | 3 | 14 | 1 |
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+---+----+------------+----------+--------+ |
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5 | R1 R2 A B | 12 |
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>----+ Vcc 1 +--------+-------->A 9 SB4
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10 | | 9
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>----+ Gnd 74LS93 2 +----------------->A10 SB5
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| | 8
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| 5 4 +----------------->A11 SA4
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| | 11
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| 8 +------+---------->A12 SA6
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| R1 R2 | |
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+---+----+--------------------------------+ |
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| 2 | 3 |
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| | +--------------------------+
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| | | +-----------------+
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| 2 | 3 | 14 | 1 |
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+---+----+------------+----------+--------+ |
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5 | R1 R2 A B | 12 |
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>----+ Vcc 1 +--------+-------->A13 SA8
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10 | | 9
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>----+ Gnd 74LS93 2 +----------------->A14 SA10
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| | 8
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| 6 4 +----------------->A15 SA12
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| | 11
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| 8 +------+---------->A16 SA14
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| R1 R2 | |
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+---+----+--------------------------------+ |
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| 2 | 3 |
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| | +--------------------------+
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| | | +-----------------+
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| 2 | 3 | 14 | 1 |
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+---+----+------------+----------+--------+ |
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5 | R1 R2 A B | 12 |
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>----+ Vcc 1 +--------+-------->A17 SA16
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10 | | 9
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>----+ Gnd 74LS93 2 +----------------->A18 SB6
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| | 8
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| 7 4 +----------------->A19 SB7
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| | 11
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| 8 +----------------->A20 SB8
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+-----------------------------------------+
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+-------------------------------------+
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>-16--+ Vcc 1C0 +---6-------------> D0 SA20
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| 1C1 +---5-------------> D4 SA28
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>--8+-+ Gnd 1C2 +---4-------------> D8 SA21
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| | 1C3 +---3-------------> D12 SB25
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1 +-+ Strobe 1G |
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15 +-+ Strobe 2G LS153 |
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SEL0 | |
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>--15--+ A 1 2C0 +---10------------> D1 SA23
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SEL1 | 2C1 +---11------------> D5 SA25
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>--2---+ B 2C2 +---12------------> D9 SA24
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| 2C3 +---13------------> D13 SB24
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+--+-------+--------------------------+
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AD0>---------+ 7 + 9
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AD1>-----------------+
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+-------------------------------------+
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>-16--+ Vcc 1C0 +---6-------------> D2 SA26
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| 1C1 +---5-------------> D6 SA22
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>--8+-+ Gnd 1C2 +---4-------------> D10 SA27
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| | 1C3 +---3-------------> D14 SB23
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1 +-+ Strobe 1G |
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15 +-+ Strobe 2G LS153 |
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SEL0 | |
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>--15--+ A 2 2C0 +---10------------> D3 SA29
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SEL1 | 2C1 +---11------------> D7 SA19
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>--2---+ B 2C2 +---12------------> D11 SA30
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| 2C3 +---13------------> D15 SB22
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+--+-------+--------------------------+
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AD2>---------+ 7 + 9
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AD3>-----------------+
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GND>----------------------------------------> SA1, SA32, SB16, SB17
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+5 >----------------------------------------> SA2, SA32
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P2 >-----> CNT >--------------+--->
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P3 >-----> CLR >-----+--> |
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P4 >-----> SEL0--> | ---
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P5 >-----> SEL1--> | --- .0015
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P6 >-----> AD0--> --- | uF
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P7 >-----> AD1--> --- 1 |
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P8 >-----> AD2--> | uF |
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P9 >-----> AD3--> | |
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P18 >-----> GND >-----+--------+---->
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---
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--- 1uF
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+5 >------------------+------------->
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